Hello @ccstorexz,
For the record, the timelock you are using is NOT OpenZeppelin’s timelock. This is from compound, so you should probably have asked them.
Still, from what you are saying, the timelock works just fine. Transaction execution reverted is a revert message you get when the transaction you are trying to execute through the timelock fails. This means that whatever you are telling the timelock to do, is invalid, potentially because the timelock doesn’t have the right to do the transaction.